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High-chromium cast iron for wear-resisting grinding ball and preparation method of high-chromium cast iron

A high-chromium cast iron and wear-resistant ball technology, applied in the field of wear-resistant balls, can solve the problems of high impact toughness of cast iron balls, increase production costs, and reduce production efficiency, and achieve high impact loads, improve hardness and wear resistance, The effect of improving hardenability

Inactive Publication Date: 2019-08-16
NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high impact toughness of the cast balls when using the above-mentioned large-scale ball mill, early surface peeling or broken balls appear in the cast balls during use, which greatly increases ball consumption, increases production costs, causes waste of resources, and reduces Productivity

Method used

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  • High-chromium cast iron for wear-resisting grinding ball and preparation method of high-chromium cast iron

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high chromium cast iron used for wear-resistant balls proposed by the present invention is composed of the following components by weight percentage: C2.3%, Si 1.0%, Mn 0.4%, Cr 16%, Mo 0.6%, Ni 0.4 %, V 0.08%, B 0.1%, Nb 0.1%, Re 0.1%, S 0.03%, P 0.03%, and the balance is Fe.

[0022] The present invention also proposes a method for preparing the above-mentioned high-chromium cast iron for wear-resistant balls, comprising the following steps:

[0023] S1. Smelting: Add steel scrap, pig iron, ferrosilicon, and ferromanganese into an intermediate frequency induction furnace for smelting, adjust the composition before the furnace, raise the temperature to 1550°C, and then perform deoxidation treatment, and then add ferrochrome, ferromolybdenum, ferrovanadium, and nickel block, ferro-niobium, then add ferro-boron for the first modification treatment, then add Re for the second modification treatment, and then release from the furnace;

[0024] S2. Casting: pouring the m...

Embodiment 2

[0027] A high-chromium cast iron used for wear-resistant balls proposed by the present invention is composed of the following components by weight percentage: C3.0%, Si 0.5%, Mn 1.0%, Cr 20%, Mo 0.3%, Ni 0.8 %, V 0.02%, B 0.05%, Nb 0.2%, Re 0.01%, S 0.03%, P 0.03%, and the balance is Fe.

[0028] The present invention also proposes a method for preparing the above-mentioned high-chromium cast iron for wear-resistant balls, comprising the following steps:

[0029] S1. Smelting: Add steel scrap, pig iron, ferrosilicon, and ferromanganese into an intermediate frequency induction furnace for smelting, adjust the composition before the furnace, raise the temperature to 1570°C, and then perform deoxidation treatment, and then add ferrochromium, ferromolybdenum, ferrovanadium, and nickel block, ferro-niobium, then add ferro-boron for the first modification treatment, then add Re for the second modification treatment, and then release from the furnace;

[0030] S2. Casting: pouring t...

Embodiment 3

[0033] A high chromium cast iron used for wear-resistant balls proposed by the present invention is composed of the following components by weight percentage: C2.5%, Si 0.9%, Mn 0.5%, Cr 17%, Mo 0.5%, Ni 0.6 %, V 0.05%, B 0.08%, Nb 0.16%, Re 0.04%, S 0.02%, P 0.02%, and the balance is Fe.

[0034] The present invention also proposes a method for preparing the above-mentioned high-chromium cast iron for wear-resistant balls, comprising the following steps:

[0035] S1. Smelting: Add steel scrap, pig iron, ferrosilicon, and ferromanganese into an intermediate frequency induction furnace for smelting, adjust the composition before the furnace, raise the temperature to 1560°C, and then perform deoxidation treatment, and then add ferrochromium, ferromolybdenum, ferrovanadium, and nickel block, ferro-niobium, then add ferro-boron for the first modification treatment, then add Re for the second modification treatment, and then release from the furnace;

[0036] S2. Casting: pouring ...

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Abstract

The invention discloses high-chromium cast iron for a wear-resisting grinding ball and a preparation method of the high-chromium cast iron, and relates to the technical field of wear-resisting grinding balls. The high-chromium cast iron comprises the following components of, in percentage by weight, 2.3%-3.0% of C, 0.5%-1.0% of Si, 0.4%-1.0% of Mn, 16%-20% of Cr, 0.3%-0.6% of Mo, 0.4%-0.8% of Ni,0.02%-0.08% of V, 0.05%-0.1% of B, 0.1%-0.2% of Nb, 0.01%-0.1% of Re, less than or equal to 0.03% of S, less than or equal to 0.03% of P, and the balance of Fe. According to the high-chromium cast iron, the contents of the chemical components in the high-chromium cast iron are reasonably adjusted, and the quenching stress is effectively eliminated by controlling the chromium-carbon ratio and the heat treatment process; a prepared grinding ball is high in impact load, and the hardness, the impact toughness and the wear-resisting property of the cast ball can be well balanced, so that the phenomena that in early stage, the surface of the cast ball is easy to be peeled, the broken ball rate is high and the like are improved; and the prepared grinding ball is high in impact load, and can meetthe use requirements of large-scale ball grinders in the industry of cement, mines, electric power and the like.

Description

technical field [0001] The invention relates to the technical field of wear-resistant balls, in particular to a high-chromium cast iron used for wear-resistant balls and a preparation method thereof. Background technique [0002] Ball mill is an industrial equipment for crushing materials after being crushed. It is widely used in the preparation of powder raw materials for products such as glass, ceramics, and fertilizers. It is also an indispensable equipment for mines, power plants, and cement production industries. [0003] With the development of industry, in order to improve the production efficiency of powder, ball mills are constantly developing in the direction of large-scale. At present, the diameter of ball mills used by large industrial and mining enterprises has generally reached more than 5m, and larger diameters and capacities are improving work efficiency. At the same time, it also brings problems such as increased abrasive impact, increased frequency of shutd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/08C22C37/10C22C33/08C21D1/18C21D5/00C21D9/36
CPCC21D1/18C21D5/00C21D9/36C22C33/08C22C37/08C22C37/10Y02P10/20
Inventor 陈全心姚永茂吴明忠周峰陈灿光
Owner NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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